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| The pH is measured by means of a combined electrode. This consists of a reference electrode (calomel electrode, filled with a saturated potassium chloride solution) and an indication electrode (glass electrode). At the interface of two solutions with different concentrations a difference of potential is present. By means of the combined electrode this difference of potential is measured and read off by means of a pH meter. |
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| Matrices qualified by the Dutch RvA: | Drinking water, Groundwater, Surface water |
| Reporting limit: | 1 pH, matrix dependent |
| Measurement uncertainty: | 0.2pH |
| Sustainability: | 1 day
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| Sampling bottle: | Plastic
, clear
, 500 ml
(fill up to cap)
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